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Measurement of the CKM matrix element vertical bar V-cb vertical bar from B-0 -> D*(-)l(+)nu(l) at Belle

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dc.contributor.authorWaheed, E.
dc.contributor.authorUrquijo, P.
dc.contributor.authorFerlewicz, D.
dc.contributor.authorAdachi, I.
dc.contributor.authorMizuk, R.
dc.contributor.authorPakhlov, P.
dc.date.accessioned2024-11-21T11:52:05Z
dc.date.available2024-11-21T11:52:05Z
dc.date.issued2019
dc.description.abstractWe present a new measurement of the Cabibbo-Kobayashi-Maskawa matrix element vertical bar V-cb vertical bar from B-0 -> D*(-)l(+)nu(l) decays, reconstructed with the full Belle data set of 711 fb(-1) integrated luminosity. Two form factor parametrizations, originally conceived by the Caprivi-Lellouch-Neubert (CLN) and the Boyd, Grinstein and Lebed (BGL) groups, are used to extract the product F(1)eta(EW)vertical bar V-cb vertical bar and the decay form factors, where F(1) is the normalization factor and eta(EW) is a small electroweak correction. In the CLN parametrization we find F(1)eta(EW)vertical bar V-cb vertical bar = (35.06 +/- 0.15 +/- 0.56) x 10(-3), rho(2) = 1.106 +/- 0.031 +/- 0.007, R-1 (1) = 1.229 +/- 0.028 +/- 0.009, R-2(1) = 0.852 +/- 0.021 +/- 0.006. For the BGL parametrization we obtain ,F(1)eta(EW)vertical bar V-cb vertical bar = (34.93 +/- 0.23 +/- 0.59) x 10(-3), which is consistent with the world average when correcting for F(1)eta(EW). The branching fraction of B-0 -> D*(-)l(+)nu(l )is measured to be B(B-0 -> D*(-)l(+)nu(l))= (4.90 +/- 0.02 +/- 0.16)%. We also present a new test of lepton flavor universality violation in semileptonic B decays, B(B-0 -> D*(-)e(+)nu)/B(B-0 -> D*(-)mu(+)nu) = 1.01 +/- 0.01 +/- 0.03. The errors quoted correspond to the statistical and systematic uncertainties, respectively. This is the most precise measurement of F(1)eta(EW)vertical bar V-cb vertical bar and form factors to date and the first experimental study of the BGL form factor parametrization in an experimental measurement.
dc.identifier.citationMeasurement of the CKM matrix element vertical bar V-cb vertical bar from B-0 -> D*(-)l(+)nu(l) at Belle / Waheed, E [et al.] // Physical Review D. - 2019. - 100. - № 5. - 10.1103/PhysRevD.100.052007
dc.identifier.doi10.1103/PhysRevD.100.052007
dc.identifier.urihttps://www.doi.org/10.1103/PhysRevD.100.052007
dc.identifier.urihttps://www.scopus.com/record/display.uri?eid=2-s2.0-85072963301&origin=resultslist
dc.identifier.urihttp://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000485197400001
dc.identifier.urihttps://openrepository.mephi.ru/handle/123456789/18677
dc.relation.ispartofPhysical Review D
dc.titleMeasurement of the CKM matrix element vertical bar V-cb vertical bar from B-0 -> D*(-)l(+)nu(l) at Belle
dc.typeArticle
dspace.entity.typePublication
oaire.citation.issue5
oaire.citation.volume100
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